Mr Johnson was moved after his coronavirus symptoms worsened earlier in the week, in case he should require ventilation.
But so far, that has not proven necessary.
Stuart Smith reports from London.
A new system of boarding buses is being trialled in London amid growing concern over the safety of drivers.
Fourteen transport workers in the UK capital have now died after contracting coronavirus.
Holly Hudson has more.
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In a media briefing, she said that two more patients for Covid-19 have tested negative in all three tests taken. One is in Dar es Salaam and the other in Arusha. The country's total recoveries now stand at five.
Daniel Kijo has more from Dar es Salaam.
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The Bank of France says that the country is now in recession after GDP growth sunk to -6% in the first three months of 2020.
It comes as France suffers its worst one-day rise in the number of deaths due to the coronavirus pandemic.
Ross Cullen has more from Paris.

Russia's largest tech firm Yandex says its data show slightly more people outside on the streets of Moscow this week than last, despite a lockdown. Authorities have asked people in the capital to stay indoors unless they're buying food, seeking emergency medical care or doing essential jobs. Lucy Taylor reports.
British Prime Minister Boris Johnson remains in intensive care in London battling coronavirus.
But his condition is described as stable and he has not yet required the use of a ventilator.
The Queen has sent get-well messages to Mr. Johnson and his family.
Reporter Matthew Thompson is outside St. Thomas' hospital in London.
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Russia's small businesses are asking for government support to help them survive a coronavirus lockdown. Non-essential workplaces are closed until the end of the month, but President Vladimir Putin has said workers should still be paid their full wages. Moscow Correspondent Lucy Taylor reports.